Floatless carburetor



' April 20, 1926.

. WHITEMAN FLOATLESS CARBURETOR Filed Augqst 18, 1922 SIM wanker Lawrefnce White-man Patented Apr. 20, 1926.

- LAVRENCE WI'IITEMAN, F SHINNLSTON', EST VIRGINIA.

FLOATLESS oannunn'r onj Applicationofiletl August 18, 1922. Serial No. 582,710.

To all whom it may concern:

Be it known that I, LAWRENCE VVrrrrE- MAN, a citizen of the United States, residing at Shinnston, in'the county of Harrison and State of Vest Virginia, have invented certain new and useful Improvements in Floatless Carburetors, of which the following is a specification.

My said invention relates to a carburetor and it is an object of the invention to provide a carburetor which shall operate without the use of a float such as is commonly found in devices of this character.

A further object is to provide a carburetor the mixing chamber of which shall be supplied with both hot and cold air to be mingled with the gasoline or other liquid fuel.

Referring to the accompanying drawings which are made a part hereof and on which similar reference characters indicate similar parts, p

Figure 1 is a side elevation of my device with parts broken away,

Figure 2 a plan, and

Figure 3 a detail of apart shown in the other figures.

In the drawings reference character indicates the tubular body of the carburetor, having secured to one side thereof'a receptacle for gasoline 1l,'here shown as tubular. The receptacle has an inlet pipe 12 adjacent its upper end and an outlet pipe 13 adjacent its lower end, the latter communis eating with a fuel nozzle 14. At the lower end of the receptacle 11 is a plug l1 by means of which the contents of the re ceptaele may be drained off. This plug finds its use in draining off water which is sometimes mixed with gasoline and which in this device willsettle at the bottom of the receptacle below the opening into outlet pipe 13 and is thus prevented from gaining aeeess to the mixing chamber.

The fuel nozzle 14: comprises a lower en larged portion having a threaded extension 15 adapted to engage threads on the body 10 and a central cavity opening through the top of the fuel nozzle and being enlarged below the extension 15; At the lower end of the valve a cook 16 is attached having a handle 17 by operation of which the valve may be drained.

A needle valve 18 is slidably located in the upper wall of the body 10 and is normally positioned to close the fuel passage in the nozzle 11. The needle valve is supported on a lever 19 and is normally held by means of a spring 20' infa position to closethe opening in the nozzle let, said its free end a roller 21.. This roller co-aets with a cam surface on a lever 22 mounted on the shaft 23 carrying a butterfly valve 24; which serves as a throttle. The cam portion lever 19 having at of the lever is best shown in Figure 3 and comprises a downwardly inclined portion 25 of the lever and a leaf spring 26 secured thereto at one end as'by a screw 27 and adjustably spaced therefrom at the other end by set-screw 28. In this manner the-mclination of the leaf spring maybe changed and thus the operation of the needle valve will also be varied.

At one side of the earburetoris an inlet pipe 29 having threaded connection to the body 10 and having side openings at 30 and 31 leading to a central passage through which cold air passes to the mixing chamber in the body 10. A pipe 32 serves to conduct hot air into the mixing chamber adjacent its opposite end, this pipe being here shown as connected to the end. closure of the body 10.

The air for pipe 32 may be heated by the I exhaust gases of the engine.

In the operation of my device the needle is normally held in position to close the valve'by-means of the spring 20 as shown in Figure 1. \V hen the engine is to be operated the throttle is opened to an extent predetermined according to the desired speed and rotation of the shaft- 23 causes the cam QGto depress the adjacent end of lever 19 and raise the needle 18'to a suiiicient extent to admit the necessary amount of fuel. The greater the degree to which the throttle is opened the further also will the needle be withdrawn to admit. additional fuel and vice Having thus fully described my said invention, what I claim as new and desire to secure by Letters Patent, is: 1

A carburetor.comprising a body, a fuel with an oflset portion, a roller on said oflset portion, an operating arm for said throttle valve having an extension normally over lying the roller on said lever for pressing said roller toward said body against the action of said spring means for raising the needle valve from its seat, an adjustable cam plate carried on the underside of said extension for varying the angle of the inclined surface of the operating extension, and a set screw extending through said operating extension into engagement With said cam plate to vary the opening movement of the needle valve relative to the opening movement of the throttle valve, set forth.

In Witness whereof, I have hereunto set my hand at Glarksburg, lVest Virginia, this 10th day of July, A. D. nineteen hundred and twenty-two.

LAWRENCE VVHITEMAN.

substantially as 1 

